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Catalyst for methanation of carbon dioxide-containing synthesis gas, preparation method and application

A carbon dioxide and catalyst technology, which is applied to a catalyst for methanation of carbon dioxide-containing synthesis gas, its preparation method and application field, can solve the problems of excessive raw material gas requirements, increased investment cost and high carbon dioxide content, and achieves one-time investment and operating costs. Reduction, great economic benefit, low methane content effect

Active Publication Date: 2010-06-16
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Limited by catalyst performance and other reasons, the current synthesis gas methanation process is that the crude synthesis gas is transformed and purified before methane is synthesized. Carbon dioxide, an important carbon resource in the crude synthesis gas, is removed in advance, forming a large resource waste, while lengthening the technological process and increasing investment costs, its technical economy is low
[0004] Chinese patent CN1024536C discloses a catalyst and preparation method for syngas methanation, but the requirements for raw gas are too high, and the content of carbon dioxide in the product is relatively high
Chinese patents CN1043639A and CN1016146B respectively disclose a method for preparing a synthesis gas methanation catalyst, but they are mainly used to remove carbon monoxide in a hydrogen-rich atmosphere, and are not suitable for the process of producing high calorific value gas
No catalysts directly used for catalytic methanation of carbon dioxide-containing syngas were found after searching

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Use ZrO 2 as a carrier. A nickel nitrate solution was prepared according to the amount that Ni accounted for 65.0 wt% in the final sample, and the carrier was impregnated with equal volume. The sample was dried at 60°C for 24 hours and calcined at 300°C for 6 hours to obtain the catalyst sample. The obtained catalyst composition: 65.0wt% Ni / 35.0wt% ZrO 2

[0022] The obtained catalyst was tabletted and sieved to obtain 60-80 mesh catalyst particles, and 2 ml was filled in a single-tube reactor. Use hydrogen in situ reduction, reduction temperature 250°C, reduction gas volume space velocity 500h -1 , reduction pressure 0.1MPa. The reaction temperature is 500°C, the reaction pressure is 0.1MPa, and the gas volume space velocity is 4000h -1 , the raw material gas adopts carbon dioxide-containing synthesis gas, in which the raw material gas H 2 and CO molar ratio n(H 2 ) / n(CO)=8.0mol / mol, CO 2 Volume content: 50%. The catalyst evaluation results are shown in Table...

Embodiment 2

[0024] Sepiolite was chosen as the carrier. A ruthenium chloride solution was prepared according to the amount that Ru accounted for 5.0 wt% in the final sample, and the carrier was impregnated with equal volume. The sample was dried at 150°C for 10 hours and calcined at 600°C for 2 hours to obtain the catalyst sample. The obtained catalyst composition: 5.0wt% Ru / 95.0wt% sepiolite.

[0025] The obtained catalyst was tabletted and sieved to obtain 60-80 mesh catalyst particles, and 2 ml was filled in a single-tube reactor. In-situ hydrogen reduction is used, the reduction temperature is 300°C, and the volumetric space velocity of the reducing gas is 1500h -1 , The reduction pressure is 0.3MPa. The reaction temperature is 400°C, the reaction pressure is 0.3MPa, and the gas volume space velocity is 3500h -1 , the raw material gas adopts carbon dioxide-containing synthesis gas, in which the H in the raw gas 2 and CO molar ratio n(H 2 ) / n(CO)=6.0mol / mol, CO 2 Volume content:...

Embodiment 3

[0027] Choose Al 2 o 3 as a carrier. A mixed solution of nickel nitrate and ammonium molybdate was prepared according to the amount that Ni accounted for 35.0 wt % and Mo accounted for 15.0 wt % in the final sample, and the carrier was impregnated with equal volumes. The samples were dried at 100°C for 10 hours and calcined at 400°C for 2 hours. The obtained catalyst composition: 35.0wt% Ni / 15.0wt% Mo / 50.0wt% Al 2 o 3 .

[0028] The obtained catalyst was tabletted and sieved to obtain 60-80 mesh catalyst particles, and 2 ml was filled in a single-tube reactor. In-situ hydrogen reduction is used, the reduction temperature is 400°C, and the volumetric space velocity of the reducing gas is 2000h -1 , The reduction pressure is 0.3MPa. The reaction temperature is 450°C, the reaction pressure is 0.5MPa, and the gas volume space velocity is 5000h -1 , the raw material gas adopts carbon dioxide-containing synthesis gas, in which the H in the raw gas 2 The molar ratio with CO ...

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Abstract

The invention discloses a catalyst for methanation of carbon dioxide-containing synthesis gas, which is characterized by comprising the following components in percentage by weight: 5 to 65 percent of active component, 0 to 45 percent of metal assistant and 25 to 90 percent of carrier; and the calculation of the catalyst is based on the weights of an active component element, a metal assistant element and the carrier. The catalyst has the advantages of catalyzing the carbon dioxide-containing synthesis gas to perform methanation and running efficiently and stably.

Description

technical field [0001] The invention belongs to a catalyst for methanation of synthesis gas, its preparation method and application, in particular to a catalyst for catalytic methanation of synthesis gas containing carbon dioxide, its preparation method and application. technical background [0002] The clean utilization of coal and biomass has always been an important direction in the field of energy utilization. With the continuous growth of the world economy, the contradiction between the supply and demand of oil and natural gas is prominent, and the price continues to be high. The eyes of the world are all on the development of oil and natural gas alternative energy. The production of oil, natural gas and chemical products from carbon-containing resources such as coal and biomass through synthesis gas route is one of the most important technical routes. Dependence on oil and other chemicals. Syngas-to-methanol technology is relatively mature, and syngas-to-oil and othe...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J23/46B01J23/883B01J23/89B01J23/889B01J23/887B01J23/652C07C9/04C07C1/04C07C1/12
Inventor 孙予罕李德宝陈从标侯博姜东
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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